The State of VoIP Peering

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The State of VoIP Peering

• Charles Studt
• Director of Product Management, VoEX

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VoIP Peering Basics

• Why we peer?
• Reduce transport costs
• Increase quality of IP traffic
• Privacy and security
• Deploy new services
• How we peer?
• Bilaterals termination agreements
• Exchanges
• Registries and ENUM
• What we peer?
• VoIP
• TDM voice??

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Minimize Cost, Maximize Quality

• PSTN Transport

• IP Peering

• Reduce the hops
• Compact the layers
• Connect directly
• Achieve scale

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How Does ENUM Fit In?

• ENUM provides
• A universal addressing scheme for IP
• Foundation for enhanced services

VSP
Wireless
Wireline

• PSTN

IP
MSO

• You provide
• Peering relationships
• Media transport

Ent
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What is ENUM?

• TElephone NUMber Mapping
• IETF RFC 3761
• Based on DNS architecture
• E.164 ? NAPTR
• Registry, registrar, registrant

• The ENUM working group has defined a DNS-based
  architecture and protocol RFC 3761 by which an
  E.164 number, as defined in ITU Recommendation
  E.164, can be expressed as a Fully Qualified
  Domain Name in a specificInternet Infrastructure
  domain defined for this purpose (e164.arpa).

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How ENUM Works
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Various Flavors of ENUM
Public ENUM
Private ENUM
Carrier ENUM

• End-user control of data, users opt-in
• Publicly-accessible registry
• Resolution accuracy depends on self-policing by
  end-users
• Uses e164.arpa tree

• Network mechanics similar to Public User ENUM
• Closed group, private focus
• User data not propagated across Internet
• Small, non-public community
• Does not use e164.arpa tree

• AKA Provider, Infrastructure, Operator ENUM
• Similar to Private, but broader in scope to
  multiple service providers
• Shared routing and device interconnection between
  service providers
• Trusted community
• Does not use e164.arpa tree

• One size does not fit all

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ENUM and VoIP Peering
ENUMDNS Service
SIPProxy
SIPProxy
ENUM is a technology specification, not a
business solution
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Essential Guidance
Service Provider IP Islands
Wireless Providers
eCommunitySKYPEGoogle
EnterpriseNetworks Avaya Cisco
Traditional Providers(Local, LongDistance)
VSPsVonageLingo
CableCompanies
Voice Peering

• Eliminates costly PSTN routing and transport
• Expands on-net footprint
• Provides inter-carrier interoperability over IP
• Delivers enhanced communications applications

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Essential Guidance

• Size matters
• Number of peered end-points determines network
  value
• Bridge IP and legacy domains
• Target Voice Peering, not VoIP Peering
• Search out complete solutions
• ENUM provides addressing function, peering
  requires media transport interoperability,
  commercial terms
• Employ experienced vendors
• Find vendors/suppliers who have done this before
  as a managed service